<?php
/**
 * Created by PhpStorm.
 * User: zhuzhuzhu
 * Date: 2016/9/21
 * Time: 19:18
 */
header('Content-type:text/html;charset=utf-8');
?>
<html>
<head>
<title>数学运算</title>
<style>
 body{background-color:#eee; font-size:14px;}
    table{*border-collapse:collapse; border-spacing:0; width:100%; color:#2B2B2B;}
        .bordered {border:solid #DADADA 1px; background-color:#fff；text-align:center;}
        .bordered tr,td{border: solid #DADADA 1px;padding: 10px;}
        .bordered tr:nth-child(5){text-align: right;}
        .bordered tr:nth-child(6){text-align: right;}
        .bordered tr:nth-child(1){font-weight: bold;}
        span{color:red;}
        </style>
    </head>
<body>
<?php
const DISCOUNT=0.8;
$fruit1 = '香蕉';
$fruit2 = '苹果';
$fruit3 = '橘子';
$fruit1_num = 2;
$fruit2_num = 1;
$fruit3_num = 3;
$fruit1_price= 7.99;
$fruit2_price= 6.89;
$fruit3_price= 3.99;
$fruit1_total =$fruit1_num *$fruit1_price;
$fruit2_total =$fruit2_num *$fruit2_price;
$fruit3_total =$fruit3_num *$fruit3_price;
$total = ($fruit1_total+$fruit2_total+$fruit3_total)*DISCOUNT;
$str ="<table class='bordered'>" ;
$str .="<tr><td>商品名称</td><td>购买数量（斤）</td><td>商品价格（元/斤）</td></tr>";
$str .="<tr><td>$fruit1</td><td>$fruit1_num</td><td>$fruit1_price</td></tr>";
$str .="<tr><td>$fruit2</td><td>$fruit2_num</td><td>$fruit2_price</td></tr>";
$str .="<tr><td>$fruit3</td><td>$fruit3_num</td><td>$fruit3_price</td></tr>";
$str .="<tr><td colspan='3'> 商品折扣：<span>". DISCOUNT. "</span> </td></tr>";
$str .="<tr><td colspan='3'> 打折后购买商品总价格：{$total}元</td></tr>";
$str .="</table>";
echo $str;
?>
</body>
</html>
